Interaction of a strong laser pulse with matter transfers not only energy but also linear momentum of the photons. Recent experimental advances have made it possible to detect the small amount of linear momentum delivered to the photoelectrons in strong-field ionization of atoms. We present numerical simulations as well as an analytical description of the subcycle phase (or time) resolved momentum transfer to an atom accessible by an attoclock protocol. We show that the light-field-induced momentum transfer is remarkably sensitive to properties of the ultrashort laser pulse such as its carrier-envelope phase and ellipticity. Moreover, we show that the subcycle-resolved linear momentum transfer can provide novel insights into the interplay between nonadiabatic and nondipole effects in strong-field ionization. This work paves the way towards the investigation of the so-far unexplored time-resolved nondipole nonadiabatic tunneling dynamics.

中文翻译：

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强场隧穿电离中子周期线性动量转移的理论。

强激光脉冲与物质的相互作用不仅传递能量，而且传递光子的线性动量。最近的实验进展使得在原子的强场电离中检测到传递到光电子的少量线性动量成为可能。我们提供了数值模拟以及对子周期阶段（或时间）的解析动量传递给原子钟协议可访问的原子的解析描述。我们表明，光场引起的动量转移对超短激光脉冲的特性（例如其载流子包络相位和椭圆率）非常敏感。此外，我们表明，子周期解析的线性动量转移可以提供强电场电离中非绝热和非偶极效应之间相互作用的新颖见解。